#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 30px;
}
*::-webkit-scrollbar {
  /*滚动条整体样式*/
  width: 8px;
  /*高宽分别对应横竖滚动条的尺寸*/
  height: 8px;
}

*::-webkit-scrollbar-thumb {
  /*滚动条里面小方块*/
  border-radius: 10px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0);
  background: #d2daea;
}

*::-webkit-scrollbar-track {
  /*滚动条里面轨道*/

  border-radius: 10px;
  background-color: rgba(0, 0, 0, 0);
  opacity: 0;
}